Experiment	Measurement	Reference
Belle	\([8.1 ^{+3.0}_{-2.7}\mbox{ (stat)} \pm 2.4\mbox{ (syst)}] \times 10^{-4}\)	PRL 91,262002 (2003)
BaBar	\([1.0 \pm 0.3\mbox{ (stat)} \pm 0.1\mbox{ (syst)} ^{+0.4}_{-0.2}\mbox{ (correlated systematic)}] \times 10^{-3}\)	PRL 93,181801 (2004)
Average	\(\mathbf{[8.9 \pm 2.9\mbox{ (combined)}] \times 10^{-4}}\)